src/variants/shogi/behaviour.cpp

   1 /*
   2   Copyright (c) 2007 Paolo Capriotti <p.capriotti@gmail.com>
   3
   4   This program is free software; you can redistribute it and/or modify
   5   it under the terms of the GNU General Public License as published by
   6   the Free Software Foundation; either version 2 of the License, or
   7   (at your option) any later version.
   8 */
   9
  10 #include "behaviour.h"
  11
  12 #include <core/board.h>
  13 #include <core/color.h>
  14 #include <core/move.h>
  15 #include <core/piece.h>
  16 #include <core/poolcollection.h>
  17 #include <core/pool.h>
  18 #include <core/state.h>
  19
  20 namespace Shogi {
  21
  22 Behaviour::Behaviour(const IBehaviour* behaviour)
  23 : Delegators::Behaviour(behaviour) { }
  24
  25 void Behaviour::captureOn(IState* state, const Point& square) const {
  26   Piece* captured = state->board()->get(square);
  27   if (captured != NULL && *captured != Piece()) {
  28     if (captured->get("promoted").toBool()) {
  29       captured->setType(m_promotionmanager->getDepromotion(captured->type()));
  30     }
  31     state->pools()->pool(opponent(captured->color()))->insert(-1, *captured);
  32   }
  33   m_behaviour->captureOn(state, square);
  34 }
  35
  36 bool Behaviour::mayPromote(const IState* state, const Move& move) const {
  37   // promoted piece cannot promote again
  38   if (move.promotion())
  39     return false;
  40
  41   // does that piece type can even promote ?
  42   if (promotionManager()->getPromotion(state->board()->get(move.src())->type()) == NULL)
  43     return false;
  44
  45   // move starts or ends on the 3 rows on the other side ?
  46   return ((state->turn() == Black::self()) ?
  47           (move.src().y >= 6 || move.dst().y >= 6) :
  48           (move.src().y <= 2 || move.dst().y <= 2));
  49 }
  50
  51 } // namespace Shogi